Question

21. The mother is five times as old as her son. Five years later, the mother will be three times as old as her son. Then the present age of the mother is
a. 40 years
b 35 years
c.30 years
d 25 years​

Answer 1

Answer:

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Step-by-step explanation:

A= 40 years

Answer 2

Step-by-step explanation:

let age of mother = x

age of son = y

according to question

x = 5y (1)

5 + x = 3(5 + y) (2)

SUBSTITUTING THE VALUE OF (1) in (2)

5 + x = 3(5 + y)

5 + 5y = 15 + 3y

5y - 3y = 15 - 5

2y = 10

y = 10/2

y = 5

BY SUBSTITUTING THE VALUE OF Y IN EQUATION (1)

x = 5y

x = 5 × 5

x = 25 years ans.